Bread wrapping machine



l. C. GELLMAN BREAD WRAPPING MAGHINE Jan. 21, 1941.

Original Filed March 8. 1937 2 Sheets-Sheet 1 NNN /'ael I 'eZl/zan/ lINVENTOR.I

BY mf /975 ATTORNEY.

Jam 21, 1941- l. c. GELLMAN BREAD WRAPPING MACHINE Original Filed March8, 1937 2 Sheets-Sheet 2 WMM @GNN www Israel v. eZl//zan/ Y INVENTOR.

1 BY l H15 ATTORNEY.

MN Q Y wlwl I u gwn@ .Q lfwr 4 .NVV/VMM- 1 mmm .Q QN www A r mw www mmPatented Jan. 2.1, 1941 PATENT OFFICE 2,229,281' y BREAD WRAPPINGMACHINE Israel C. Gellman, Rock Island, lll., assignor to GellmanManufacturing Company, Rock Island, Ill., a'corporation of IllinoisOriginal application March 8, 1937, Serial No.

Divided and this application October 29, 1937, Serial No. 171,755

Claims.

This invention relatesto paper and web feeding mechanism for use withbread Wrapping and similar machines, and is a division of my pendingUnited States application Serial No. 129,561, filed 5 March 8, 1937.

' It is an object of .the invention to provide an automatic paper feedfor use with bread wrapping machines of the type having a central drivesystem and wrapping mechanism movable in 0 timed strokes and including apaper shear operable periodically therewith.

It is a further object -to provide a simple mechanism for feeding paperin predetermined lengths,

, and adapted for connection with the aforesaid l" central'drive system.l

It is another object to provide a simple adjusting mechanism fordetermining .the length of web paid out at each feeding operation.'

Yet another object is the provision of automatic paper feeding meansincluding means for supporting a plurality of web rolls, roller meansfor unwinding the web from the rolls, a rocker gear having adjustabledriving connection with the central drive system, and unidirectional`clutch means interconnecting the rocker gear and roller or feedingmeans.

Yet another object is a cutting means for severing the web in timedrelation to the feeding movement and the movement of the wrappingcarriage, the invention providing particularly a rocking knife which isengaged by a reciprocable wrapping carriage, at a certain stage in themovement of the latter, to cause the knife to shear a web of wrappingpaper.

05 Other objects and novel aspects of the invention both as to mattersof construction and operation, will become evident from 4the followingdescription taken in View of .the drawings, in which: l

Fig. 1 is a fragmentary side elevation of a wrapping machine and theautomatic feed means;

Fig. 2 is a fragmentary top plan view, partly in section, of the paperfeed roller and-clutch drive means therefor;

Fig. 3 is an enlarged detail of the segmental rocker gear and ratchetmeans for the feed roller.

Fig. 4 is a fragmentary vertical'section through the machine along lines4-4 of Fig. 2 looking at the opposite side of the frame member shown inFig. l; i

Fig. 5 is a cross section through the adjustable knife bearer supportItaken along lines 5-5 of Fie- 4; l Fig. 6 is a fragmentary top planview similar (Cl. S33-2) to Fig. 2 but taken on the opposite side of themachine from the latter and looking down along line 6-6 of Fig. 4; and

Fig. 7 is a fragmentary cross sectional detail through the knifestructure adjacent the knife -blades as seen along lines 1--1 of Fig. 6.

As viewed in Fig. 1, the wrapping machine with which the present feedmeans is especially adapted to be used, includes a main frame 24, acentral drive shaft 32 -driven by motor means 3l. 10

Mounted on frame 24 is a sprocket wheel 3|8 driven by a chain 320 from asprocket gear 322 on shaft 32, and the driven sprocket 3l8 has a drivearm 3 I 4 provided with a radial slot 3I'l provided at its outer endwith a radially movable 15 adjusting bolt means 3|1, the purpose ofwhich will later appear. .This part'of the mechanism constitutes thedriving connection between the central power system and the feedingmeans.

' Supported at an end ofthe main frame 424 are 20 a pair of uprightbrackets 200 mounted in spaced relation Iand each having opposite cradlebearings 203 into which seat paper stock or web rolls 20|. Lower down onthe brackets is an idling cross roller 205 over whichv the `twin paperwebs 204 20 pass down between the feed means onto an apro 2|2.

This feedmeans includes presser rollers 201 (Figs. 2, 4 and 6) fittedinto edgewise slots 208 in a ribbed feed apron 2I2. These rollers 201are 30 adjustable, as set forth in the co-pending parent applicationSerial No. 129,561. A master driven roller 205 having a shaft 30|journaled in and extended through the corresponding roll bracket 200,draws the paper webs 204 from the rolls and 35 feeds it onto the apron2l2 .to be halted or positioned above a wrapping elevator 28; 4asdescribed in my application Serial No. 129,561, the length of paper fedbeing determined'by certain adjustments of the bolt 3 I1. 40

Unidirectional movement of the master feed roller 206 is effected bymeans of a segmental rocker gear 304, pivotally mounted as at 306 onbracket 200, and having a depending arm 308. The rocker gear is rockedby means of a link 45 or drive arm 3I2 pivotally connected at one end310 to the depending arm 308 on the rocker gear, and at its opposite endto the 'drive arm 3l4 by means of a wing bolt 3l6 slidable in the radialslot 3I'I. 50

By adjusting the set screw 3H', the stroke of the arm 3|2 can beadjusted to vary the travel of the rocker gear and also, intimately, ofthe length of web fed by the master roller 206.

Referring to Fig. 2, it will be observed that 55 the master roller isdriven through gear means' including a ratchet clutch (Fig. 3 also)having a clutch plate 301 which floats on the roller shaft 30| and whichis provided with ratchet pawls 309 engageable with a ratchet 3|| fixedon roller shaft 30|. A gear 300 xed to the clutch plate 301 is driven byan intermediate gear 302 on shaft 303 through gear 305 driven by sector30|. Thus each time the rocker gear 304 moves downwardly (clockwise,Fig. 2), the master roller will be advanced, the presser rollers 201being preferably driven also to assure positive advance of the web, thisbeing effected by means of gear 2||ib fixed on the same shaft withrollers 201, and driven by a gear 2|1b fixed on the master roller shaft.

Means for automatically severing the advanced web intimed relation tothe operating of the rocker gear and associated feeding mechanism,includes a yoke-shaped knife frame 224 pivot ally mounted at one end, asat 225, on a cross bearer bracket 226, which extends between theuprights 200, and which is engaged at its opposite sides byadjustmentbolts 221 slidable in horizontal slots 228 so that the knife may be slidback and forth toward and away from the carriage 88.

A front bearer 22-9 is joined with the rear bearer 226 by longitudinallyextensive straps 230, and this front bearer slides on anges 24F (Figs. 4to 6) in the frame 24 and engages the depressed or stepped ends 23| ofrails 232 secured to the main rails 89 upon which the paper ultimatelyrests and up between which the elevator 28 moves.

The knife structure includes a fixed shear member 2|5 and a movableshear 240 hinged as at 24| on the knife frame or yoke, and this latterknife is urged toward the fixed knife or shear by spring means `mountedin bosses 235' extended from the knife frame (Fig. '1). Also mounted' onthe bosses 236A are spaced rollers 236 engageable by cam fingers 231 oncarriage 88.

It will be recalled that the elevator 28 and the carriage 88 move intimed relation through the central drive system, and also that theautomatic web feeding mechanism is likewise driven from the centraldrive. When the carriage 88 is returned to the extreme (right-hand)Position in Fig. 1, the cams 231 thereon bear down on the rollers 236 onthe knife or shear frame and pivot the knife structure 24| down againsta section of webbing, previously advanced, and shear it against thestationary member 2 I5, so that when the carriage is ready to moveforward again, the severed piece of paper is free to be pressedaround fthe loaf of bread rising on elevator 28, and as the elevator retracts,another section of paperl will advance and be cut in a similar manner.Thus the severing and feeding means cooperate in timed relation to thelmovement of the Wrapping mechanism.

The knife frame is normally moved up out of shearing position by meansof springs 213 behind the knife 24|.

In accomplishing the several objects of the invention, only one form ofarrangement has been detailed for illustrative purposes, and it will beunderstood that all changes and modifications which may be made toprovide an equivalent mechanism, are included within the scope of theinvention as defined in the appended claims.

vHaving thus described my invention, what I enum as new and desire toprotect by Letters Patent is:

1. In a wrapping machine of the type ineluding a reciprocable wrappingcarriage and means for feeding a web of wrapping material beneath thecarriage substantially parallel to the plane -of reciprocation thereof.web shearing means comprising: coacting movable and stationary shearsarranged adjacent one of the terminal reciprocal positions of saidcarriage, said movable shear being mounted for movement in a direc--tion transverse to the line of reciprocation of said carriage, meansnormally disposing said movable shearv out of engagement with saidwebbing, and coasting means on said carriage and movable shear formoving the latter against said webbing to shearv the same when saidcarriage has moved a predetermined distance toward the aforesaidterminal position.

2. In a bread wrapping machinev of the type V.including a horizontallyreciprocabl'e carriage and coacting folding instrumentalities, means forfeeding a web of wrapping paper inthe direction of reciprocation of thecarriage into position beneath the latter, shearing means comprisingcoacting stationary and movable shear members .extending transversely ofsaid webbing near one of the reciprocal terminal positions ofthecarriage, said movable shear being yieldingly urged away from saidwebbing and the companion shear and means on said carriage moved by thelatter intoA operative engagement with said movable shear once duringeach complete reciprocation of the carriage for moving said movableshear toward and into shearing engagement with said webbing.

3. In a device of the class describedv having a carriage arranged forreciprocation in cooperation with other wrapping instrumentalities toeffect wrapping operations on an-article, means for feeding paperwebbing in the direction of reciprocation of -the carriage and in aplane substantially parallel with said direction of reciprocation foruse in said wrapping operations, and means for cutting said webbing atintervals in timed relation with the movements of said carriage, saidmeans including a. stationary shear extending transversely of saidwebbing near one of the terminal positions of reciprocation of thecarriage, and a movable shear mounted to extend transversely of thewebbing for cooperation with said stationary shear 'and also formovement toward and away from the latter into and out of shearingengagement with said webbing, means normally urging said movable shearaway from the stationary shear, and means moved by said carriageintooperative engagement-with contact means on said movable shear when saidcarriage moves a predetermined 'distance toward said terminal positionand effective to move the movable shear against said webbing to shearthe latter cooperably with the stationary shear when said carriage movesan additional amount toward said terminal position.

4. In a bread wrapping machine, a reciprocable wrapping carriage, meansfor feeding paper webbing relative to said carriage for purposes ofwrapping, and web cutting means including a movable shear yieldinglyIdisposed in a nonshearing position relative to webbing fed asaforesaid, and cooperating cam means on said carriage and shear foreffecting movement of the latter into shearing position relative to saidwebbing once during each reciprocation of the carriage.

5. In a bread wrapping machine, a reciprocably movable wrapping member,a pivoted shear, and means for feeding paper webbing past said sheartoward said wrapping member for utilization by the latter in wrappingoperation, means yieldingly urging said shear into non-shearingposition, and cam means on said wrapping member and movable with thelatter into driving engagement with said shear to move the latter intoshearing position when said wrapping member is moved into apredetermined position.

wrappingmember, means for feeding a wrapping 6. In a bread wrappingmachine, a reciprocabie ftively engage cooperating cam means forming apart of said shearing mechanism for moving the shear against said web tosever the latter when said wrapping member is moved to a predeterminedposition.

'1. Inxa bread wrappingmachine, a wrapping member arranged for periodicmotion, means cooperably driven with said Wrapping member for feedingpaper webbing to the latter for utilization in the wrapping operationsthereof, and shearing mechanism including shear means arranged formovement transversely toward and away from said webbing, meansyieldingly positioning vsaid shear means away from said webbing, andmeans movable by said wrapping member transiently en- Vgageable withcooperating means forming part of said shearing mechanism for movingsaid shear means toward said webbing to shear the latter once duringeach periodic movement of said wrapping member. 1,

8. In a bread wrapping'machine, a reciprocable wrapping carriage andcooperatively driven means for feedingv paper webbing into positionrelative to said carriage for wrapping purposes, and shearing mechanismincluding shear means arranged to extend transversely of said webbingand mounted for movement toward and away from said webbing and also forpivotal movement about an axis transverse to said webbing, spring meansnormally urging said shear means in a direction aw'ay from said webbingout of the path of movement thereof,V spring means normally pivotingsaid shear means in a direction toward said webbing, cam means arrangedas an operative part of saidshearing mechanismI for moving said shearmeans toward. said webbing to severthe latter, and cooperating cam meansarranged for vmovement with said carriage for transient engagementwithsaid first-mentioned cam means of the shearing mechanism to effect ashearing of said webbing once during each complete reciprocal-,ion ofsaid carriage.

9. In a bread wrapping machine, a wrapping member arrangedfor movementback and forth and'cooperating means for feeding paper webbing intowrapping position relative to said wrapping member, and shearingmechanism including a knife frame mounted for pivotal movement about anaxis extending Vtransversely of said webbing, for movement in adirection toward and away from the latterfspring meansV normallypivoting said frame away from said webbing, knife means -pivotallymounted on said frame for movement about an axis transverse of saidwebbing andvin a general direction toward and away from the latter, astationary shear ar- Y ranged transversely of said webbing, and springmeans normally urging said knife means toward said stationary shear. acam finger projected from said wrapping member, and cam engaging meanson said knife frame and engaged by said cam finger to pivot said knifeframe and knife means toward said webbing once during each cycle ofmovement of said wrapping member.

10. In a bread wrappingmachine, a reciprocable wrapping carriage andcooperable means for feeding paper webbing in the direction ofreciprocation of the carriage and into a position relative to the latterfor wrapping purposes, and automatic shearing mechanism including asta-f tionary shear arranged transversely below said webbing, a knifecarrying frame pivoted for movement about an axis transverse to saidwebbing for movement toward and away from the 4latter on a side thereofopposite said stationary shear, movable knife means pivotally mounted onsaid knife frame for movement about an axis transverseof said webbingand in a general directlon toward and away from said webbing and thestationary shear therebelow, spring means normally pivoting said knifemeans toward said stationary shear, and spring means normally pivotingsaid knife frame away from said shear to dispose said knife means out ofthe path of

